On Mon, Jul 13, 2015 at 17:26:43 +0200, Jakub Jelinek wrote: > > > > > + /* FIXME: Support device-to-device somehow? */ > > > > > > > > Should libgomp copy data device-host-device if device-device is not > > > > supported by > > > > target? Current liboffloadmic doesn't support this. I'll find out if > > > > there are > > > > any plans. > > > > > > There is also the option to spawn an offloaded function that will just > > > call > > > memcpy, or have such a function next to the main () of the program that > > > we link > > > in. > > > > Do you mean the case when src_devicep == dst_devicep ? It's easy to support > > this by adding new func into plugin, whithout any changes in liboffloadmic. > > I thought about memcpy between different devices... > > Well, even src_devicep == dst_devicep does not guarantee it is the same > device, that is the case only if also src_devicep->target_id == > dst_devicep->target_id, right?
Why? Devices of one type with different target_id's have different entries in devices[]. > I wouldn't worry about that and just return EINVAL when copying in between > different devices. I'll prepare a patch, which will add an interface for copying within one device, covered by GOMP_OFFLOAD_CAP_OPENMP_400. -- Ilya
